What would be the fastest way to get that done today? I know React Native is heavily used, but it seems like too heavy and complex for such a simple set of requirements.
What can I use to get a simple application out in a few days?
Personally for any app I want to get out quickly on both platforms I have been using Flutter and find it is a good compromise, better than React Native (IMO) and quick to iterate and simple to still keep a native feel for each platform (and still have performance). Still the best way is to create a native app for each platform, but for what you are doing that seems like overkill at this point.
Really it all depends on how your content is updated and where it is at today that would drive how I'd likely approach it.
I was able to hoist something in Flutter quickly and painlessly. I was pretty impressed. I hope I never muck with Cordova again after working with it. :)
Worth an hour and a hello-world tutorial to see if you're keen on it. I liked it.